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Thank you for purchasing our PW66 external wastegate. With over 60 years of combined turbocharger 
development and racing experience, we at Precision Turbo take great pride in providing you with the 
best external wastegate on the market today. The PW66 is made from high grade, high temperature 
stainless steel and billet aluminum components. It features our own purpose designed Kevlar reinforced 
wastegate diaphragm and a 347 stainless investment cast valve body. Our investment cast valve body 
has a smooth internal surface and the largest valve on the market today. This gives you better flow and   
more accurate boost control. The PW66 features a Nickel Chromium Alloy valve and 5 different 17-7 
precipitation hardened springs. Also included are stainless steel inlet and outlet flanges with clamps. 
With a satin black anodized, 6061 aluminum billet wastegate cap you will have years of good looks and 
protection from the elements. The PW66 is generally compatible with most aftermarket manual and 
electronic boost controllers on the market today. If you have any questions or need any technical 
support, our experienced Sales Staff are here to help.  

Summary of Contents for PW66

Page 1: ...ment cast valve body has a smooth internal surface and the largest valve on the market today This gives you better flow and more accurate boost control The PW66 features a Nickel Chromium Alloy valve and 5 different 17 7 precipitation hardened springs Also included are stainless steel inlet and outlet flanges with clamps With a satin black anodized 6061 aluminum billet wastegate cap you will have ...

Page 2: ... 1 Large green 9 psi wastegate spring WG002 100 1 Large blue 18 psi wastegate spring WG002 026 2 Pressure port cap WG002 019 2 Seal washer WG002 010 1 Valve seat WG002 011 1 304 Stainless steel inlet flange WG002 050 1 Inlet clamp assembly WG002 012 1 304 Stainless steel outlet flange WG002 051 1 Outlet clamp assembly PW66 MAN 1 Instruction manual Note Two springs are pre installed SPRING NOTES Da...

Page 3: ... be diverted away from the turbine side of the turbocharger effectively slowing and or stabilizing the turbine wheels speed This stabilization results in a smooth and steady boost pressure level created by the compressor wheel of the turbocharger Open pressure of the valve can be controlled via spring rate and or a boost controller such as a manual boost controller or an electronic boost controlle...

Page 4: ... and are compatible with most stainless steel and mild steel welding rod material It is recommended to secure all vacuum and or boost control hoses securely with zip ties or cushioned clamps Route all vacuum hoses away from high heat sources such as the turbine housing and exhaust manifold Allow for cool airflow around the top billet wastegate cover Use caution when working on a hot engine Wastega...

Page 5: ...4mm hex key loosen and remove the wastegate v band clamp The use of a press or vise may be used to hold down the wastegate can top while loosening the clamp If using a press or vise for disassembly use a cloth or micro fiber rag to protect the surface finish from scratches Remove the clamp and cap slowly using care to secure the spring top plate and spring springs upon removal 5 PART NUMBER PBO085...

Page 6: ...hat you do not to tear or scratch the diaphragm 4 Orient the wastegate can top to the desired position and compress the wastegate can top until it is seated with the wastegate can bottom Use of a press or vice may be necessary depending on spring selection With the v band flanges properly aligned install the v band clamp If you need to re align the upper can relieve tension on top rotate and recom...

Page 7: ...et of your manual boost controller Refer to your manual controllers instructions to determine which port is inlet port Install another hose from the outlet port of the manual boost controller to the top banjo barb port of the wastegate Secure all hose connections with zip ties or hose clamps Make sure to route all hoses away from high heat sources With the manual boost controller closed so that no...

Page 8: ... large spring 16 6 psi WARNING Installing higher spring rate springs into your PW66 wastegate may cause higher than expected boost levels It is recommended to reduce your boost controller back to its minimum setting and monitor your new minimum boost level with the new spring or springs before increasing your boost pressure Failure to do so can lead to severe detonation and engine damage Any damag...

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